1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/ossrv/ssl/libcrypto/src/crypto/dsa/dsa_key.c Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,128 @@
1.4 +/* crypto/dsa/dsa_key.c */
1.5 +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
1.6 + * All rights reserved.
1.7 + *
1.8 + * This package is an SSL implementation written
1.9 + * by Eric Young (eay@cryptsoft.com).
1.10 + * The implementation was written so as to conform with Netscapes SSL.
1.11 + *
1.12 + * This library is free for commercial and non-commercial use as long as
1.13 + * the following conditions are aheared to. The following conditions
1.14 + * apply to all code found in this distribution, be it the RC4, RSA,
1.15 + * lhash, DES, etc., code; not just the SSL code. The SSL documentation
1.16 + * included with this distribution is covered by the same copyright terms
1.17 + * except that the holder is Tim Hudson (tjh@cryptsoft.com).
1.18 + *
1.19 + * Copyright remains Eric Young's, and as such any Copyright notices in
1.20 + * the code are not to be removed.
1.21 + * If this package is used in a product, Eric Young should be given attribution
1.22 + * as the author of the parts of the library used.
1.23 + * This can be in the form of a textual message at program startup or
1.24 + * in documentation (online or textual) provided with the package.
1.25 + *
1.26 + * Redistribution and use in source and binary forms, with or without
1.27 + * modification, are permitted provided that the following conditions
1.28 + * are met:
1.29 + * 1. Redistributions of source code must retain the copyright
1.30 + * notice, this list of conditions and the following disclaimer.
1.31 + * 2. Redistributions in binary form must reproduce the above copyright
1.32 + * notice, this list of conditions and the following disclaimer in the
1.33 + * documentation and/or other materials provided with the distribution.
1.34 + * 3. All advertising materials mentioning features or use of this software
1.35 + * must display the following acknowledgement:
1.36 + * "This product includes cryptographic software written by
1.37 + * Eric Young (eay@cryptsoft.com)"
1.38 + * The word 'cryptographic' can be left out if the rouines from the library
1.39 + * being used are not cryptographic related :-).
1.40 + * 4. If you include any Windows specific code (or a derivative thereof) from
1.41 + * the apps directory (application code) you must include an acknowledgement:
1.42 + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
1.43 + *
1.44 + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
1.45 + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.46 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.47 + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
1.48 + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
1.49 + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
1.50 + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1.51 + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
1.52 + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
1.53 + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
1.54 + * SUCH DAMAGE.
1.55 + *
1.56 + * The licence and distribution terms for any publically available version or
1.57 + * derivative of this code cannot be changed. i.e. this code cannot simply be
1.58 + * copied and put under another distribution licence
1.59 + * [including the GNU Public Licence.]
1.60 + */
1.61 +
1.62 +#include <stdio.h>
1.63 +#include <time.h>
1.64 +#include "cryptlib.h"
1.65 +#ifndef OPENSSL_NO_SHA
1.66 +#include <openssl/bn.h>
1.67 +#include <openssl/dsa.h>
1.68 +#include <openssl/rand.h>
1.69 +
1.70 +static int dsa_builtin_keygen(DSA *dsa);
1.71 +
1.72 +EXPORT_C int DSA_generate_key(DSA *dsa)
1.73 + {
1.74 + if(dsa->meth->dsa_keygen)
1.75 + return dsa->meth->dsa_keygen(dsa);
1.76 + return dsa_builtin_keygen(dsa);
1.77 + }
1.78 +
1.79 +static int dsa_builtin_keygen(DSA *dsa)
1.80 + {
1.81 + int ok=0;
1.82 + BN_CTX *ctx=NULL;
1.83 + BIGNUM *pub_key=NULL,*priv_key=NULL;
1.84 +
1.85 + if ((ctx=BN_CTX_new()) == NULL) goto err;
1.86 +
1.87 + if (dsa->priv_key == NULL)
1.88 + {
1.89 + if ((priv_key=BN_new()) == NULL) goto err;
1.90 + }
1.91 + else
1.92 + priv_key=dsa->priv_key;
1.93 +
1.94 + do
1.95 + if (!BN_rand_range(priv_key,dsa->q)) goto err;
1.96 + while (BN_is_zero(priv_key));
1.97 +
1.98 + if (dsa->pub_key == NULL)
1.99 + {
1.100 + if ((pub_key=BN_new()) == NULL) goto err;
1.101 + }
1.102 + else
1.103 + pub_key=dsa->pub_key;
1.104 +
1.105 + {
1.106 + BIGNUM local_prk;
1.107 + BIGNUM *prk;
1.108 +
1.109 + if ((dsa->flags & DSA_FLAG_NO_EXP_CONSTTIME) == 0)
1.110 + {
1.111 + BN_init(&local_prk);
1.112 + prk = &local_prk;
1.113 + BN_with_flags(prk, priv_key, BN_FLG_CONSTTIME);
1.114 + }
1.115 + else
1.116 + prk = priv_key;
1.117 +
1.118 + if (!BN_mod_exp(pub_key,dsa->g,prk,dsa->p,ctx)) goto err;
1.119 + }
1.120 +
1.121 + dsa->priv_key=priv_key;
1.122 + dsa->pub_key=pub_key;
1.123 + ok=1;
1.124 +
1.125 +err:
1.126 + if ((pub_key != NULL) && (dsa->pub_key == NULL)) BN_free(pub_key);
1.127 + if ((priv_key != NULL) && (dsa->priv_key == NULL)) BN_free(priv_key);
1.128 + if (ctx != NULL) BN_CTX_free(ctx);
1.129 + return(ok);
1.130 + }
1.131 +#endif